When I reflect with what slow and limited supplies the stream of science hath hitherto descended to us, how difficult to be obtained by those most ardent in its search, how certain to be neglected by all who regard their ease; how liable to be diverted, altogether dried up, by the invasions of barbarism; can I look forward without wonder and astonishment to the lot of a succeeding generation on whom knowledge will descend like the first and second rain, uninterrupted, unabated, unbounded; fertilizing some grounds, and overflowing others; changing the whole form of social life; establishing and overthrowing religions; erecting and destroying kingdoms.